Patents by Inventor Nobuyuki Ashikaga
Nobuyuki Ashikaga has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20120035281Abstract: A phosphorus-adsorbing material is produced to include a polymer-based material modified with at least either of a primary and a secondary amine and a metal supported on the polymer-based material, and a phosphorus recovery system is structured by using the phosphorus-adsorbing material.Type: ApplicationFiled: August 11, 2011Publication date: February 9, 2012Inventors: Akiko SUZUKI, Hideyuki TSUJI, Shinji MURAI, Tatsuoki KOHNO, Katsuya YAMAMOTO, Shinobu MONIWA, Hidetake SHIIRE, Satoshi HARAGUCHI, Nobuyuki ASHIKAGA
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Publication number: 20120024027Abstract: There is provided a water purification material including: a composite metal hydroxide exhibiting a layered structure and including iron ions, calcium ions, and at least one of nitrogen ions and sulfur ions; and at least one of calcium hydroxide and ferric hydroxide, in which a main peak intensity due to at least one of the calcium hydroxide and the ferric hydroxide measured by x-ray crystal structure analysis is equal to or less than half a main peak intensity due to the layered structure of the composite metal hydroxide.Type: ApplicationFiled: August 15, 2011Publication date: February 2, 2012Inventors: Hideyuki TSUJI, Tatsuoki Kohno, Akiko Suzuki, Shinji Murai, Katsuya Yamamoto, Nobuyuki Ashikaga
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Publication number: 20110253632Abstract: An oil adsorbent is configured so as to include: at least one particle of an inorganic particle and a metallic particle, at least one particle constituting a core; and a polymer covering the core, wherein the polymer is a copolymer made of at least one substance selected from the group of molecular structure A consisting of styrene, butadiene, isoprene, ethylene and propylene and at least one substance selected from the group of molecular structure B consisting of acrylic acid, methacrylic acid, acrylonitrile, vinylpyridine, vinyl alcohol, maleic anhydride and maleic acid.Type: ApplicationFiled: April 21, 2011Publication date: October 20, 2011Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Taro Fukaya, Shinetsu Fujieda, Shinji Murai, Akiko Suzuki, Hideyuki Tsuji, Tatsuoki Kohno, Nobuyuki Ashikaga
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Patent number: 8002980Abstract: A former (11) works, when supplied with wastewater containing heavy metals and hydrogen sulfide, to react heavy metals contained in wastewater with hydrogen sulfide to form sulfide salts, an acquirer (12) works, when supplied with sulfide salts and acid, to acquire hydrogen sulfide and heavy metal ions produced by reactions between sulfide salts and acid, a hydrogen sulfide supply line (13) supplies hydrogen sulfide acquired by the acquirer to the former, and a collection line (20) collects heavy metal ions.Type: GrantFiled: September 5, 2008Date of Patent: August 23, 2011Assignee: Kabushiki Kaisha ToshibaInventors: Ryoichi Arimura, Nobuyuki Ashikaga, Takashi Menju, Atsushi Yukawa, Hiromi Tsukui, Hirofumi Noguchi, Shinji Oono
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Patent number: 7972502Abstract: An aeration-less water treatment apparatus including an anaerobic reactor which receives sewage to cause the sewage to flow as an upward stream, and an aerobic reactor which receives treated water from the anaerobic reactor to cause the water to flow as a downward stream so that the water contacts aerobic microorganisms and air to aerobically treat the polluted matter in the water, the apparatus further including a suspended sludge section located in a lower part of the anaerobic reactor and in which the anaerobic microorganisms are suspended in the sewage, and a carrier section located in an upper part of the anaerobic reactor and having carriers to which the anaerobic microorganisms are attached, the anaerobic microorganisms having flowed from the suspended sludge section being further attached to the carriers.Type: GrantFiled: July 2, 2008Date of Patent: July 5, 2011Assignee: Kabushiki Kaisha ToshibaInventors: Masahiko Tsutsumi, Takumi Obara, Nobuyuki Ashikaga, Katsuya Yamamoto, Hiroshi Tamura
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Publication number: 20110056878Abstract: According to one embodiment, a membrane filtration system includes a raw water tank, a first tank, a second tank, a nanofiltration membrane module comprises a nanofiltration membrane, and removes the solute from the raw water with a solute removal rate of 1% to 30%, a first pump for supplying the raw water from the raw water tank to the module to cause the raw water to permeate through the membrane and send the water that has permeated through the membrane as a primary water to the first tank, a RO module comprises a RO membrane that further removes the solute from the primary water, and a second pump for supplying the primary water from the first tank to the RO module to cause the primary water to permeate through the membrane and send the water that has permeated through the membrane as a secondary water to the second tank.Type: ApplicationFiled: August 12, 2010Publication date: March 10, 2011Inventors: Takeshi Matsushiro, Nobuyuki Ashikaga, Takashi Menju, Futoshi Kurokawa, Yoshie Akai, Koichi Matsui, Hideaki Yamagata, Hideyuki Tsuji, Takanori Fukagawa, Takahiro Soma
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Publication number: 20110056885Abstract: A valuable resource recovery system includes an engineered powder supply unit that supplies an engineered powder into drainage water (the engineered powder can adsorb a valuable resource and can be desorbed from the engineered powder), an agitation unit that agitates the drainage water supplied with the engineered powder, an engineered powder separation unit that separates the engineered powder from the drainage water agitated by the agitation unit, an engineered powder collection unit that collects the engineered powder separated by the engineered powder separation unit, and a desorption-recycle unit that desorbs the valuable resource from the engineered powder collected by the engineered powder collection unit to recycle the engineered powder and the valuable resource. According to the system, the valuable resource can be desorbed from the engineered powder and then recycled.Type: ApplicationFiled: August 30, 2010Publication date: March 10, 2011Inventors: Hidetake SHIIRE, Nobuyuki Ashikaga, Shinobu Moniwa, Tomoaki Kiuchi
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Patent number: 7901582Abstract: A phosphorus recovery method and a phosphorus recovery system which can make equipment size small, and can be added easily also to an existing wastewater treatment facility, and can recover phosphorus by low cost, are provided. A phosphorus compound adsorption material includes a nitrogen containing compound which has an amino group at an end of molecular structure, a carrier supporting the nitrogen containing compound, and zinc ion or iron ion fixed to the nitrogen containing compound. After passing water to be treated containing phosphorus to an adsorption tower filled up with this phosphorus compound adsorption material to make phosphorus stick to the phosphorus compound adsorption material, a drug solution for desorption is supplied to the adsorption tower, and phosphorus is desorbed in liquid and is recovered.Type: GrantFiled: March 18, 2009Date of Patent: March 8, 2011Assignee: Kabushiki Kaisha ToshibaInventors: Hidetake Shiire, Nobuyuki Ashikaga, Satoshi Haraguchi, Tokusuke Hayami, Tatsuoki Kono, Akiko Suzuki, Shinetsu Fujieda, Katsuya Yamamoto
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Publication number: 20100300948Abstract: According to one embodiment, water to be treated is passed through each of a first reactor vessel and second reactor vessel, phosphorus contained in the water is removed by using an adsorbent, thereafter the liquid held in each of the reactor vessels is discharged from each of a first treated water discharge path and second treated water discharge path, and thus the influence of soluble impurities derived from the water is eliminated. Further, when suspended solids impurities contained in the water are accumulated in the phosphorus adsorbent, the accumulated impurities are eliminated by a reverse cleaning operation using a liquid to be thereafter introduced from a reactor vessel liquid introduction path into the reactor vessel, and hence the influence of the suspended solids in the water on a desorption agent liquid to be thereafter introduced into a crystallization vessel, and containing phosphorus from the phosphorus adsorbent is eliminated.Type: ApplicationFiled: May 28, 2010Publication date: December 2, 2010Inventors: Shinobu Moniwa, Hidetake Shiire, Satomi Ebihara, Masahiko Tsutsumi, Nobuyuki Ashikaga, Satoshi Haraguchi, Akiko Suzuki, Hideyuki Tsuji, Tatsuoki Kohno, Kazuhiko Noda, Katsuya Yamamoto
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Publication number: 20100300949Abstract: According to one embodiment, in order to eliminate impurities, and the like, water to be treated is passed through each of reactor vessels, phosphorus contained in the water to be treated is removed by using an adsorbent, and thereafter the liquid held in each of the reactor vessels is discharged through each of first to third treated water discharge paths, thereby eliminating the impurities, and the like derived from the water to be treated. It is possible to eliminate the influence of the impurities in the water to be treated on the discharged desorption agent liquid containing phosphorus from the phosphorus adsorbent can be eliminated, and hence it is possible to obtain a phosphorus-containing liquid containing no substance other than the recovered phosphoric matter material.Type: ApplicationFiled: May 28, 2010Publication date: December 2, 2010Inventors: Shinobu Moniwa, Hidetake Shiire, Satomi Ebihara, Masahiko Tsutsumi, Nobuyuki Ashikaga, Satoshi Haraguchi, Akiko Suzuki, Hideyuki Tsuji, Tatsuoki Kohno, Kazuhiko Noda, Katsuya Yamamoto
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Publication number: 20100273242Abstract: Disclosed is a desulfurization apparatus including a biological reaction tank 1 into which a hydrogen sulfide gas-containing gas is introduced, a carrier-packed layer 2a, 2b that is arranged in the biological reaction tank 1 and packed with a carrier for adhesion of microorganisms, a means that feeds an oxygen-containing gas to the biological reaction tank 1, and two or more sprinkling mechanisms 3, 4 that sprinkle water necessary for the organisms on the upper part of the biological reaction tank 1.Type: ApplicationFiled: December 16, 2008Publication date: October 28, 2010Inventors: Takumi Obara, Yasuhiko Nagamori, Nobuyuki Ashikaga, Hiroshi Tamura, Takayuki Ishige, Takeo Yamamori
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Publication number: 20100261266Abstract: Disclosed is a biological desulfurization apparatus including a reaction tower 1 into which biogas generated by anaerobic fermentation of organic waste is to be introduced, a carrier-packed layer 2a, 2b arranged in the reaction tower and provided with a carrier to which microorganisms have adhered, an air feeding pipe 3 that mixes air into a lower part of the reaction tower, and a sprinkling mechanism 7 that sprinkles water on an upper part of the reaction tower, wherein the carrier-packed layer is arranged in two or more stages.Type: ApplicationFiled: December 19, 2008Publication date: October 14, 2010Inventors: Yasuhiko Nagamori, Takumi Obara, Nobuyuki Ashikaga, Hiroshi Tamura, Takayuki Ishige, Takeo Yamamori
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Publication number: 20100230343Abstract: A water treatment apparatus includes a first treatment tank forming thereon a first, fixed bed includes a powdery phosphorus adsorbent includes an inorganic layered compound, wherein the first bed separates phosphorus and solid matter from the water, and recovers the phosphorus in a state adsorbed on the phosphorus adsorbent in the first bed, a second treatment tank forming a second, fluidized or fixed bed includes the phosphorus adsorbent, wherein the second bed separates phosphorus from the water received from the first treatment tank, and recovers the phosphorus in a state adsorbed on the phosphorus adsorbent in the second bed, and a transferring line configured to transfer the phosphorus adsorbent, having phosphorus adsorbed thereon in the second treatment tank, from the second treatment tank to the first treatment tank.Type: ApplicationFiled: January 27, 2010Publication date: September 16, 2010Inventors: Shinobu Moniwa, Masahiko Tsutsumi, Hidetake Shiire, Nobuyuki Ashikaga, Satomi Ebihara, Katsuya Yamamoto
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Publication number: 20100230358Abstract: An oil adsorbent includes a plurality of particles, each being constituted from at least one of an inorganic particle and an organic particle as a core and a polymer covering the core. The plurality of particles are aggregated to form an aggregate so that a porosity of the aggregate is 70% or more.Type: ApplicationFiled: February 19, 2010Publication date: September 16, 2010Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Taro Fukaya, Shinetsu Fujieda, Shinji Murai, Akiko Suzuki, Hideyuki Tsuji, Tatsuoki Kohno, Arisa Yamada, Nobuyuki Ashikaga
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Publication number: 20100230332Abstract: An adsorption apparatus for wastewater, having a reaction tank configured to allow adsorption of a resource substance contained in wastewater on an adsorbent to be carried out therein, a supplying device configured to supply wastewater containing the resource substance to the reaction tank, a charging device configured to charge the adsorbent into the reaction tank, a water discharging device configured to discharge a treated water, obtained after the wastewater is removed of the resource substance by the adsorption, from the reaction tank, a adsorbent discharging device configured to discharge the adsorbent having the resource substance adsorbed thereon, from the reaction tank, and an adsorbent flow out preventing device configured to prevent flow out of the adsorbent from the reaction tank during the adsorption.Type: ApplicationFiled: January 28, 2010Publication date: September 16, 2010Inventors: Masahiko TSUTSUMI, Shinobu Moniwa, Katsuya Yamamoto, Nobuyuki Ashikaga, Satomi Ebihara, Hidetake Shiire, Kazuhiko Noda
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Publication number: 20100224566Abstract: An adsorbent includes: at least one of an inorganic particle and a metallic particle as a core; at least two kinds of polymers, which cover a surface of the core, with respective different surface tensions; and a convex-concave surface structure formed due to a difference in surface tension between the at least two kinds of polymers.Type: ApplicationFiled: February 19, 2010Publication date: September 9, 2010Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Taro FUKAYA, Shinetsu FUJIEDA, Shinji MURAI, Akiko SUZUKI, Hideyuki TSUJI, Tatsuoki KOHNO, Nobuyuki ASHIKAGA
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Publication number: 20100101985Abstract: Disclosed is an apparatus for removing dissolved hydrogen sulfide, including an anaerobic treatment tank (1) that anaerobically treats organic discharged water, a circulation water tank (3), means for introducing organic discharged water into circulation water, a treated-water tank (4) that temporarily stores anaerobically treated water, a biological desulfurization tower (5) that desulfurizes biogas formed by anaerobic treatment, air feeding means for feeding air to the biological desulfurization tower (5), water feeding means for feeding water to the biological desulfurization tower (5), first aerating means (9a) for blowing a part of biologically desulfurized gas from the biological desulfurization tower (5), into the treated-water tank (4), and second aerating means (9b) for blowing exhaust gas discharged from the treated-water tank (4) into a solution circulating between the anaerobic treatment tank (1) and circulation water tank (3).Type: ApplicationFiled: December 12, 2008Publication date: April 29, 2010Inventors: Yasuhiko Nagamori, Takumi Obara, Nobuyuki Ashikaga, Hiroshi Tamura, Toshiharu Ishihara, Takayuki Ishige, Miyuki Momiji
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Patent number: 7704385Abstract: An aeration-less water treatment system includes an anaerobic treatment tank which subjects sewage supplied by a pump to anaerobic treatment by causing the sewage to upflow, and an aerobic treatment tank which subjects anaerobically treated water to aerobic treatment by letting the anaerobically treated water to downflow by natural downflow. The aerobic treatment tank includes an aerobic filter bed section in which carriers to which aerobic microorganisms are adhered are arranged. The aerobic filter bed section subjects the anaerobically treated water to decomposition treatment by putting the anaerobic treatment water in contact with the aerobic microorganisms adhered to surfaces of the carriers. The aerobic filter bed section is provided with an air port which takes in air into under normal pressure, thereby activating the aerobic microorganisms.Type: GrantFiled: May 7, 2007Date of Patent: April 27, 2010Assignee: Kabushiki Kaisha ToshibaInventors: Masahiko Tsutsumi, Nobuyuki Ashikaga, Yasuhiko Nagamori, Takumi Obara, Takashi Menju, Katsuya Yamamoto
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Publication number: 20100072140Abstract: The present invention provides a water purification material capable of selectively adsorbing phosphorus dissolved in wastewater, and also provides a water purification method employing the material. The water purification material comprises a composite metal hydroxide containing iron ions and calcium ions in its structure, and this composite metal hydroxide has a layered structure. In the water purification method of the present invention, the water purification material is brought into contact with wastewater so as to remove and recover phosphate ions in the wastewater.Type: ApplicationFiled: September 14, 2009Publication date: March 25, 2010Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Hideyuki Tsuji, Tatsuoki Kono, Akiko Suzuki, Shinetsu Fujieda, Shinji Murai, Nobuyuki Ashikaga, Katsuya Yamamoto
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Publication number: 20100059444Abstract: A water treatment system comprises: an oil removal apparatus including a fixed-bed reactor configured to hold an adsorption particles by use of a magnetic unit, the adsorption particles each including a base material containing magnetite, the adsorption particles configured to adsorb oil included in to-be-treated water; a pretreatment apparatus configured to recover the oil from the adsorption particles sent from the oil removal apparatus; and a thermal energy generating apparatus configured to obtain thermal energy from the oil recovered by the pretreatment apparatus.Type: ApplicationFiled: August 11, 2009Publication date: March 11, 2010Inventors: Shinobu Moniwa, Hidetake Shiire, Satomi Ebihara, Nobuyuki Ashikaga, Tomoaki Kiuchi